libstdc++-v3/config/locale/gnu/c_locale.h

   1 // Wrapper for underlying C-language localization -*- C++ -*-
   2
   3 // Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 //
  31 // ISO C++ 14882: 22.8  Standard locale categories.
  32 //
  33
  34 // Written by Benjamin Kosnik <bkoz@redhat.com>
  35
  36 #ifndef _C_LOCALE_H
  37 #define _C_LOCALE_H 1
  38
  39 #pragma GCC system_header
  40
  41 #include <cstring>              // get std::strlen
  42 #include <cstdio>               // get std::snprintf or std::sprintf
  43 #include <clocale>
  44 #include <langinfo.h>           // For codecvt
  45 #include <iconv.h>              // For codecvt using iconv, iconv_t
  46 #include <libintl.h>            // For messages
  47
  48 #define _GLIBCXX_C_LOCALE_GNU 1
  49
  50 #define _GLIBCXX_NUM_CATEGORIES 6
  51
  52 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
  53 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
  54
  55   extern "C" __typeof(uselocale) __uselocale;
  56
  57 _GLIBCXX_END_NAMESPACE
  58 #endif
  59
  60 _GLIBCXX_BEGIN_NAMESPACE(std)
  61
  62   typedef __locale_t            __c_locale;
  63
  64   // Convert numeric value of type _Tv to string and return length of
  65   // string.  If snprintf is available use it, otherwise fall back to
  66   // the unsafe sprintf which, in general, can be dangerous and should
  67   // be avoided.
  68   template<typename _Tv>
  69     int
  70     __convert_from_v(char* __out,
  71                      const int __size __attribute__ ((__unused__)),
  72                      const char* __fmt,
  73 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
  74                      _Tv __v, const __c_locale& __cloc, int __prec)
  75     {
  76       __c_locale __old = __gnu_cxx::__uselocale(__cloc);
  77 #else
  78                      _Tv __v, const __c_locale&, int __prec)
  79     {
  80       char* __old = std::setlocale(LC_ALL, NULL);
  81       char* __sav = new char[std::strlen(__old) + 1];
  82       std::strcpy(__sav, __old);
  83       std::setlocale(LC_ALL, "C");
  84 #endif
  85
  86 #ifdef _GLIBCXX_USE_C99
  87       const int __ret = std::snprintf(__out, __size, __fmt, __prec, __v);
  88 #else
  89       const int __ret = std::sprintf(__out, __fmt, __prec, __v);
  90 #endif
  91
  92 #if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2)
  93       __gnu_cxx::__uselocale(__old);
  94 #else
  95       std::setlocale(LC_ALL, __sav);
  96       delete [] __sav;
  97 #endif
  98       return __ret;
  99     }
 100
 101 _GLIBCXX_END_NAMESPACE
 102
 103 #endif